Radio attachment for phonographs



Nov. 25, 1924.

E. E. LINEHAN RADIO ATTACHMENT FOR PHONQGR'APHS F11e'q Anr11 a, 192s Patented Nov. 25, 1924.

UNrrr-:D STATES EDWARD E. LINEHAN, 0F ST. PAUL, MINNESOTA.

RADIO ATTACHMENT FOR PHONOGRAPI-IS.

Application led April 2,

T0 all whom it may concern:

Be it lrnown that I, EDWARD E. LINEHAN, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and useful Radio Attachment for Phonographs, of which the following is a specification.

My invention relates to imi'irovements in radio attachments for phonographs.

1t has become common practice to employ the sound amplifying horns of phono-graphs to amplify sounds from the dilferent radio receiving instruments. Some of the methods of application of said instruments to phonograph horns involve the mutilation thereof and the resultant sacrifice in the resonance of the horn, (lther methods of application result in rendering the usually artistic cabinets unsightly in appearance aud are often attended with laborious manipulation required tol convert the phonograph mechanism for use in connection with radio equipment and in adapting Ait again to normal use.

An object of my invention is to provide a simple attachment for phonographs, which is easily applied thereto, without undesirably affecting the artistic features thereof, and which may be easily and quickly ope 'ated to alternately adapt the phonograph amplifier for use with the sound producing means of the phonograph and with such means of another device.

*il/lore specifically it is my object to provide, in a device of the present nature, a movable mounting common to the sound producing devices of a pl'ionograph and a radio receiving set, the movement of said mounting serving to selectively bring said devices into communication with the phonograph ampliiier and serving further, in either case, to modify the volume of sound, as may be desired.

lVith the 'foregoing and other objects in view, which will appear in the following description, the invention resides in the niovel combination and arrangement of parts and in the details of construction hereinafter described and claimed.

In the drawings, Fig. 1 is a diagrammatical view in vertical, central section, illustrating a conventional phonograph and my improved attachment applied thereto; Figs. 2 and 3 are views illustrating a portion of the top of the cabinet body and showing the converter slide, in plan, in

1923. serial No. 629,358.

different positions and Fig. 4 is a vert-ical sectional view in detail taken on the line 4-4 of F ig. 3.

Referring to the drawing, A indicates the cabinet of a conventional phonograph, the same having the ordinary sound amplifying horn 10` registering at its receiving end with an opening 11 in the head piece 12. Instead of tixedly mounting the usual hollow base 13 of the phonograph tone arm on the head piece 12 in position covering the opening' 11, I supply a special mounting therefor. This mounting comprises a plate or slide 14 having beveled side edges slidably interlocked with correspondingly beveled guides 15. Said slide is formed with openings 16 and 17 therethrough, the opening 16 being arranged to rest in full registration with the 'opening 11 in the head piece 12 when the slide 14 is moved to its extreme right position. (Figs. 8 and 4) with the right end thereof against a stop or abutment 18.

The opening 17 in said slide 'is arranged to fully register with said opening 11, when the slide 14 occupies extreme left position (Figs. 1 and 2) with` the left end thereof against a stop or abutment 19. rThe base 13 of the tone arm is mounted on the slide 14 so as to cover the opening 17 and a loud speaking radio receiver 2O or other sound conducting instrument is mounted on said slide so as to cover the opening 1G. ln using the phonograph, the slide 14 occupies the position shown in 1 and 2, wherein the tone arm of the phonograph is brought into communication 'with the horn 10, said horn being converted to use in. connection with the radio speaker 2() by merely shitting the slide 1,4 to the right and thereby bring ing the radio instrument into communication with said horn. Thus, it will be understood that the user, by a simple thrust of the slide 14, can employ the horn 10 as an amplifier for the phonograph or for other associated sound reproducing means. It will also be understood that adjustment of the slide restricting registration of the openings 16 and 17 with the opening 11 will modify the volume of sound issuing from the horn 10.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

l. The combination with a phonograph including the usual amplifying horn and hollow tone arm base and also with a radio sound producing instrument, of a slide supplying a mounting for said base and instrument, said slide traversing the receiving end of said horn and having Openings therethrough arranged to severally register with said end of said horn, one opening being in communication with said base and the other with said instrument.

2. The combination with aphonograph including the usual amplifying horn and hollow tone arm base and also with a radio sound producing instrument, of a mounting for said base and instrument, said mounting having openings therethrough, one for communication with said base and one for communication with said instrument, the

mounting being movable to selectively guide said openings into registration with the receiving end of said horn.

3, The combination. with a phonograph including the usual amplifying horn and hollow tone arm base and also with a radio sound producing instrument, of a mounting 'for said base and instrument, said mounting having openings therethrough, one 'for communication with said base and one for communication with said instrument, the mounting being movable to selectively guide said openings into registration with the receiving end of said horn and opposed abutments to stop said mounting in posit-ions acquiring full registration of said openings with said end of said horn.

ln testimony whereof, I have signed my name to this specification.

EDWARD E. LINEHAN. 

